D R A F T
Project Description Report:
Waterloo WWTP Cogeneration Facility
Prepared for
Region of Waterloo
December 2016
CH2M HILL Canada Limited Riepma Consultants Inc. Region of Waterloo
72 Victoria Street South, Suite 300 200 Kempenfelt Drive 150 Frederick Street
Kitchener, ON N2G 4Y9 Barrie, ON L4M 1C4 Kitchener, ON N2G 4J3
Contents
Section Page
Introduction ……………………………………………………………………………………………………….
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1-1
1.1 Purpose 1-1
1.2 Approvals Required 1-1
1.3 Project Location 1-1
1.4 Property Ownership and Facility Operation 1-1
1.5 Consulting Team 1-2
1.6 Site Description 1-2
1.7 Surrounding Land Uses 1-2
1.8 Land Use History ……………………………………………………………………………………..
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Project Information 2-1
2.1 Input 2-1
2.2 Facility Components 2-1
2.3 Construction 2-1
2.3.1 Construction Activities 2-2
2.3.2 Materials Brought on Site 2-2
2.3.3 Construction Equipment Used 2-2
2.3.4 Timing and Operational Plans 2-2
2.3.5 Temporary Uses of Land ……………………………………………………………….. 2-2
2.3.6 Temporary Water Takings………………………………………………………………
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2.3.7 Materials/Waste Generated 2-3
2.3.8 Potential Negative Environmental Effects 2-3
2.4 Design and Operation 2-3
2.4.1 Facility Design Plan 2-3
2.4.2 Facility Operational Plan 2-5
2.4.3 Emergency Response and Communications Plans 2-5
2.5 Decommissioning 2-6
Environmental Effects 3-1
3.1 Cultural Heritage……………………………………………………………………………………..
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3-1
3.2 Archaeology 3-1
3.3 Natural Heritage 3-1
3.4 Water Bodies 3-2
3.5 Emission, Noise and Odour Receptors 3-2
3.5.1 Emissions 3-2
3.5.2 Noise 3-2
3.5.3 Odour 3-3
3.6 Environmental Effects Summary ………………………………………………………………. 3-3
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CONTENTS
Section Page
Land Use Planning Matters …………………………………………………………………………………… 4-1
4.1 Provincial Policy Statement 2014 ……………………………………………………………… 4-1
4.2 Region of Waterloo Official Plan……………………………………………………………….. 4-1
4.3 City of Waterloo Official Plan……………………………………………………………………. 4-1
4.4 City of Waterloo Zoning Bylaw …………………………………………………………………. 4-1
Public Health and Safety ………………………………………………………………………………………. 5-1
Tables
1 Construction – Potential Negative Environmental Effects
2 Operation – Potential Negative Environmental Effects
Figures
1 Location of Waterloo Cogeneration Facility and Nearest Receptor
2 Cogeneration Facility Site Plan Layout
3 Project Location with 120 m Buffer
4 Project Location with 120 m Buffer and Ecological Land Classification
5 Project Location with 120 m Buffer and Identification of Water Bodies within Buffer
6 Noise Points of Reception Map
SECTION 1
Introduction
1.1 Purpose
The purpose of this draft Project Description Report (PDR) is to outline the proposed Biogas
Facility (herein referred to as the Cogeneration Facility) to be located at the Waterloo
Wastewater Treatment Plant (WWTP) in the City of Waterloo (City) as required in the
Renewable Energy Approval (REA) process as set out in Ontario Regulations 359/09 and 521/10.
The proposed Cogeneration Facility will have an electrical capacity of 600 kW.
The WWTP is owned by the Region of Waterloo (Region) and currently operated by the Ontario
Clean Water Agency (OCWA) pursuant to ECA 9354-8J4PUE (sewage) and ECA 4605-8QMJJA
(air) issued by the Ministry of Environment and Climate Change (MOECC).
1.2 Approvals Required
The project is to be constructed pursuant to the saveONenergy program. A placeholder
application has been submitted and approved by the local distribution company (LDC),
Waterloo North Hydro Inc., securing the Project under the saveONenergy program.
In addition to the REA required, the following approvals will be required prior to REA approval:
Natural Heritage Assessment reports approved by the Ministry of Natural Resources and
Forestry (MNRF); and
Archaeological Resource Assessment and Cultural Self-Assessment reports approved by the
Ministry of Tourism, Culture and Sport (MTCS).
The MTCS provided archaeological approval November 30, 2016. Approval from the MNRF is
expected by early 2017.
As part of the detailed design phase, approvals from the following agencies will be required:
Waterloo North Hydro Inc., Hydro One Limited, CLEAResult, Electrical Safety Authority (ESA)
and Technical Standards and Safety Authority (TSSA). The Grand River Conservation Authority
(GRCA) and local municipalities will also have to approve the project prior to construction. Any
necessary updates to Environmental Compliance Approvals (ECAs) will be completed.
No federal government approvals are required.
1.3 Project Location
The project will be located within the existing WWTP property boundary at 340 University
Avenue East in the City of Waterloo. The location and surrounding area is depicted in Figure 1.
Figure 2 provides a preliminary site plan.
1.4 Property Ownership and Facility Operation
The property is owned by the Region. The Region may choose to have the WWTP operator also
operate the Cogeneration Facility or may have third parties such as equipment manufacturers
operate the facility.
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SECTION 1 – INTRODUCTION
1.5 Consulting Team
The team retained by the Region of Waterloo is led by CH2M HILL Canada Limited (CH2M) with
support from Riepma Consultants Inc. (Riepma), CIMA and Eramosa Engineering Inc. (Eramosa).
Contact information is as follows:
Pam Law, P.Eng. Ryan Connor, P.Eng. Clare Riepma, P.Eng., R.P.P.
Senior Project Engineer Project Manager REA Lead
Region of Waterloo CH2M HILL Canada Limited Riepma Consultants Inc.
Water Services
150 Frederick Street, 72 Victoria Street S, Suite 220 Kempenfelt Drive, Barrie
Kitchener ON N2G 4J3 300, Kitchener ON N2G 4Y9 ON L4M 1C4
PLaw@regionofwaterloo.ca Ryan.Connor@ch2m.com riepma@riepma.ca
519-575-4095 519-514-1662 416-346-8258
1.6 Site Description
Figure 1 depicts the approximate location of the proposed cogeneration unit. Figure 1 also
identifies all of the land uses within 300 metres (m) of the proposed cogeneration unit. The
nearest receptor is a home on Dale Crescent located 175 m from the cogeneration unit.
1.7 Surrounding Land Uses
Lands immediately surrounding the WWTP are all open space uses. To the north and east is a
four lane highway (Ontario Highway 85). To the west, beyond the open space, is a residential
community. To the south is a municipal road (University Avenue).
1.8 Land Use History
The subject property has been used as a WWTP for many years. The WWTP was originally
constructed in 1962 and is currently being upgraded. This is considered to be a heavy industrial
public use.
SECTION 2
Project Information
2.1 Input
It is estimated that the anaerobic digesters at the existing WWTP produce 4,000 to 7,000 cubic
metres (m3) of biogas daily. Historically, the biogas was used for sludge heating by burning the
biogas in dual-fired boilers (biogas/ fuel oil). New boilers were installed which have the
potential to burn biogas and natural gas to heat sludge and digester buildings. Biogas can also
be burned via the on-site waste gas burner.
The proposed installation will intercept the biogas flow to the boilers and flare and redirect it to
a reciprocating engine generator. There is sufficient biogas to run a 600 kW engine. Should the
digester produce more gas than the engine can use, surplus gas will be directed to the new
boilers and then the existing flare. As a result, flaring will be significantly reduced.
The electrical power produced by the generator will be consumed within the WWTP, thereby
offsetting power purchases to operate the plant. No power will be exported from the site. The
heat produced by the engine will be used to heat incoming sludge to the digesters and heat the
digester buildings when required (mainly in the winter months). Since the engines are less
thermally efficient than the boilers (the total energy produced by the engines is divided
between both electrical and thermal energy instead of the boilers’ exclusively thermal energy
production), supplemental natural gas will be required to offset the reduction in thermal
energy production by the engines that is needed to meet the plant’s current boiler heating
demands.
2.2 Facility Components
The main components of the Cogeneration Facility are as follows:
One (1) gas conditioning system;
One (1) 600 kW generator package (including natural gas blending equipment); and
Two (2) heat exchangers.
Biogas storage is not recommended for the Cogeneration Facility. It is anticipated that the
WWTP will produce enough biogas to operate the engine at minimum capacity. Fluctuations in
biogas quantities will be buffered by blending with natural gas. Figure 2 illustrates the footprint
of each of these items.
2.3 Construction
Construction is expected to commence March 2018 and commissioning complete by April 2020.
Construction will be designed to minimize disruption to the existing operation of the plant. The
generator and the gas conditioning systems are containerized and will be delivered to site and
placed on a poured concrete foundation. Trenching will be required to connect all heating, gas
and electrical lines. The existing building between the two digesters will be expanded to
accommodate new heat exchangers and the existing switchgear will be modified to
accommodate the new generator.
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SECTION 2 – PROJECT INFORMATION
The Construction Plan Report describes Project activities undertaken during the construction
phase and mitigation measures for potential negative environmental effects. The report
includes sections discussing:
Construction activities;
Materials brought on site;
Construction equipment used;
Timing and operational plans;
Temporary uses of land;
Temporary water takings;
Materials/ waste generated; and
Potential negative environmental effects.
A high-level summary of these sections has been provided herein. Reference to the
Construction Plan Report should be made for further details.
2.3.1 Construction Activities
No decommissioning of major equipment is required in preparation for the Cogeneration
Facility equipment. Site preparation is expected to be minimal since no natural habitat is
present within the existing Project Location. Shallow excavations for the expansion of the
Digester Control Building and footings to support containerized equipment will be required. No
new buildings will be constructed; however, the Digester Control Building will be expanded.
Equipment manufacturers will test and inspect installed equipment. The Technical
Standards Safety Authority (TSSA) and Electrical Safety Authority (ESA) will inspect and approve
the equipment.
2.3.2 Materials Brought on Site
Where required, engineered fill will be brought on site. Concrete will be brought on site for the
foundations beneath the generator and gas conditioning system.
2.3.3 Construction Equipment Used
Conventional construction equipment will be used for this Project. A list of equipment is
included in the Construction Plan Report. Examples include excavators, cement trucks, mobile
cranes.
2.3.4 Timing and Operational Plans
Construction is expected to commence March 2018 and commissioning complete by April 2020.
The exact sequencing and duration of activities will be developed during the design phase. Care
will be taken to accommodate ongoing construction projects at the WWTP.
2.3.5 Temporary Uses of Land
Mobile site trailers for equipment storage and administrative offices are the only anticipated
construction activities that will require temporary changes to land.
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SECTION 2 – PROJECT INFORMATION
2.3.6 Temporary Water Takings
Due to shallow excavations, it is not anticipated that geotechnical issues will arise. However, if a
geotechnical investigation recommends that more than 50,000 L/d of water will need to be
pumped, a Permit to Take Water (PTTW) from the MOECC will be obtained by the Region.
2.3.7 Materials/Waste Generated
Due to the containerized approach of the Cogeneration Facility, it is not expected that there will
be significant materials or waste generated during construction. The Construction Plan Report
outlines approaches for managing waste that is generated.
2.3.8 Potential Negative Environmental Effects
The following potential negative environmental effects are described within the Construction
Plan Report:
Dust and noise emissions;
Lighting;
Vegetation and habitat;
Impacts to water resources;
Impacts on cultural heritage and archaeological resources; and
Impacts on local roads and traffic.
In addition to these effects being described within the Construction Plan Report, they are
summarized in the Environmental Effects Section of this PDR.
2.4 Design and Operation
The purpose of the Design and Operations Plan Report is to outline the site plan, equipment,
how the facility will be operated and environmental effects monitored and mitigated in
addition to an emergencies and communications plan. The report includes plans discussing:
Facility design;
Facility operation;
Environmental effects, mitigation and monitoring; and
Emergency response and communications planning.
2.4.1 Facility Design Plan
The Facility Design Plan provides details on the technical elements of the facility so that the
environmental impact of the facility can be evaluated. A description of each piece of major
equipment, its location onsite and technical requirements are described.
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SECTION 2 – PROJECT INFORMATION
2.4.1.1 Gas Conditioning System
The purpose of gas conditioning systems is to remove moisture, siloxanes and hydrogen
sulphide (H2S) from the biogas prior to it entering the engine. In order to mitigate negative
downstream effects on the processes, it is desired that that biogas have the following
parameters:
Less than 0.15% v/v H2S;
60-80% moisture content or less; and
Less than 10 mg total siloxanes/ Nm3 methane.
The biogas at the Waterloo WWWTP contains low enough concentrations of H2S that
pretreatment of the biogas for the removal of H2S is not required. The gas conditioning system
will be containerized and consist of the following major equipment:
Gas compressor to raise biogas (digester gas) pressure to overcome headloss of the gas
conditioning system and allow for direct feeding into the engine;
Condensing heat exchanger cooled by chilled water to remove moisture; and
Activated carbon to remove siloxanes.
2.4.1.2 600 kW Generator Package
The generator package will be the main component of the Cogeneration Facility, tying into the
gas conditioning system. The vendor for the internal combustion generator package has not
been selected yet, however vendor packages typically contain similar components. Typical
components include:
Gas engine generator;
Natural gas fuel blending system;
Exhaust system;
Fuel system;
Heat recovery system;
Lubricating oil system;
Switchgear; and
Control system.
The generator package will be located in close proximity to the Boiler Building, central to the
digester system (biogas tie-ins) and the Energy Centre (electrical tie-in).
The engine can only operate between 60% and 100% its capacity. A 100 kW buffer between the
engine electrical output and the plant’s electrical consumption will be maintained at all times.
Subsequently, if there is not enough electrical demand at the plant, the engine will need to be
turned down and accept less biogas as fuel. If the plant’s electrical demand is high, natural gas
may be used to supplement biogas to maximize electrical output from the engine.
2.4.1.3 Heat Exchangers
Two heat exchangers will be installed, utilizing the heat generated by the generator package to
pre-heat the recirculated boiler return water. This water is then used to heat the sludge before
it is transferred to the anaerobic digesters. The existing Digester Control Building between the
two digesters will be expanded to accommodate the new heat exchangers.
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SECTION 2 – PROJECT INFORMATION
2.4.2 Facility Operational Plan
The Facility Operational Plan outlines commissioning and operation activities. The operation of
the Cogeneration Facility is currently known at a conceptual design level. As detailed design
progresses, operational approaches will be fine-tuned and elaborated.
2.4.2.1 Consumables and Waste Products
The Cogeneration Facility is anticipated to consume the following:
Gas Conditioning System: activated carbon or proprietary media;
600 kW Generator Package: lubricant oil, engine cooling fluid; and
Heat Exchangers: heat transfer medium like glycol, potential conditioning chemicals for
anti-corrosion, descaling, etc.
The Cogeneration Facility is anticipated to produce the following waste products:
Gas Conditioning System: spent activated carbon or proprietary media.
600 kW Generator Package: used lubricant oil, engine cooling fluid.
2.4.2.2 Maintenance
A preventative maintenance schedule will be developed based on supplier maintenance
recommendations. Preventative maintenance will not affect the WWTP function as biogas can
be utilized in the existing boilers to heat sludge and buildings when necessary. This would also
be the case for emergency maintenance procedures.
2.4.2.3 Monitoring
The quantity of sludge into the digesters and biogas from the digesters will be continuously
monitored. The quality of the sludge and biogas will be periodically analyzed to optimize the
gas composition for combustion in the engine.
2.4.3 Emergency Response and Communications Plans
The purpose of the Emergency Response and Communications Plan is to develop a plan to
manage emergencies with regard to the Cogeneration Facility and provide channels for
communication to the public, municipalities, relevant Ministries of Ontario Government and
other organizations. The Emergency Response and Communications Plan developed in the
Design and Operations Report is high-level. The plan will be updated to be more functional
prior to the construction phase of the Project. The functional plan will cover all phases of the
Project from construction, through design and operation and decommissioning.
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SECTION 2 – PROJECT INFORMATION
2.4.3.1 Emergency Response
Responses to emergency scenarios will be developed in line with the Environmental Protection
Act. Of importance, a procedure for responding to spills will be developed. The functional plan
will also include a chain of communications to contact relevant stakeholders based on the
emergency scenario. Potential stakeholders include:
Public;
Region of Waterloo;
City of Waterloo;
Ministry of Environment and Climate Change; and
Ministry of Natural Resources and Forestry.
2.4.3.2 Non-Emergency Communications
The Region has implemented a webpage dedicated to the REA process. The REA process
mandates that the PDR and draft REA reports be posted on the webpage for public review prior
to public consultation. The Region has an existing protocol to receive, log and address
complaints received from the public or any other stakeholders, as does OCWA, the current
operator of the Waterloo WWTP. The functional plan will further detail this protocol and any
other emergency and non-emergency communication approaches. The functional plan will also
indicate how potential stakeholders will be provided with notification of project changes,
results of ongoing project monitoring and other relevant matters.
2.5 Decommissioning
The Cogeneration Facility will be located at the WWTP. The Region’s Wastewater Treatment
Master Plan, prepared in 2007, indicated that the Region’s intent is to have the WWTP provide
wastewater treatment for the sewershed long-term, upgrading as appropriate to accommodate
increased flows and technology advancements. It is likely that the Cogeneration Facility will
continue to function at the WWTP, maintained by equipment replacements and upgrades, so
long as it is the most efficient and economical use of biogas at the WWTP.
The purpose of the Decommissioning Plan Report is to describe potential activities to retire the
elements of the Cogeneration Facility, restoring the land and managing the excess materials
and waste.
Decommissioning of the Cogeneration Facility could include reuse or disposal of the facility
components. Some components could be used at other WWTPs due to their containerized
nature, repurposed for another use, sold or disposed of.
The Decommissioning Plan Report includes an overview of:
Procedures for dismantling and demolishing;
Site restoration;
Managing excess materials and waste; and
Decommissioning notification.
As part of the REA approval, the Director often imposes a condition in which the
Decommissioning Plan Report must be updated six months prior to actual decommissioning. As
such, decommissioning approaches will be refined and details developed at that time.
SECTION 3
Environmental Effects
As prescribed by the REA process, a Cultural Heritage Self-Assessment, Archaeological
Assessment, Natural Heritage Assessment (NHA), Water Assessment (WA), Emission Summary
Dispersion Modelling (ESDM), Noise Study and Odour study were conducted. Results of these
studies and assessments are presented in the herein.
3.1 Cultural Heritage
A Cultural Heritage Self-Assessment was completed as part of the REA process. The Region, the
City, the Ministry of Tourism, Culture and Sport (MTCS) and the Ontario Heritage Corporation
all confirm that this property nor any properties in the vicinity are designated or proposed to be
designated for protection.
3.2 Archaeology
An Archeological Resource Assessment was conducted and it was determined that the location
of the Cogeneration Facility does not contain evidence for archeological potential. The area has
previously been disturbed which would have resulted in deep subsurface alteration that would
have removed any extant archeological potential. As a result, no further archeological
assessments are recommended.
3.3 Natural Heritage
A Natural Heritage Assessment (NHA) has been completed to evaluate the natural features
located within 120 m of the Cogeneration Facility with consideration of activities involved in the
construction, operation and decommissioning of the facility. Figure 3 outlines the 120 m buffer
from the Cogeneration Facility. Further details are available in the NHA Report.
As part of the NHA, a Records Review was conducted to gather information about the area and
identify natural features. The Records Review revealed the presence of wetland and wooded
areas within 120 m of the Cogeneration Facility. No natural vegetation is located within the
WWTP property bounds. Vegetation communities do exist however, within the 120 m buffer
area. Site reconnaissance confirmed the Records Review and subsequently wooded and
wetland areas were brought forward to the Evaluation of Significance (EOS) Report as part of
the NHA. Figure 4 outlines the ecological land classification within the 120 m buffer.
Significant wildlife habitats identified include: Amphibian Breeding Habitat, Amphibian
Movement Corridors, Turtle Wintering Areas, Colonially Nesting Bird Breeding Habitat (Ground)
and the Eastern Wood-Pewee. These natural features were brought forward to the
Environmental Impact Statement (EIS) as part of the NHA. The EIS evaluated potential direct
and indirect effects on natural features and recommended mitigation strategies. The effects
and mitigation strategies relating to the operation of the Cogeneration Facility have been
included in the Environmental Effects Summary Section of this PDR.
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SECTION 3 – ENVIRONMENTAL EFFECTS
3.4 Water Bodies
A Water Assessment (WA) was completed to identify water bodies within 120 m and evaluate
the potential negative environmental effects and recommend mitigation strategies for
construction, operation and decommissioning phases. Figure 5 depicts the water bodies located
within 120 m of the Cogeneration Facility – Laurel Creek and its tributaries. Potential negative
environmental effects and recommended mitigation strategies related to the operation of the
Cogeneration Facility have been included in the Environmental Effects Summary Section of this
PDR.
3.5 Emission, Noise and Odour Receptors
ESDM, Noise Study and Odour Study reports were prepared in support of the REA application.
3.5.1 Emissions
The Cogeneration Facility is expected to emit products of combustion such as nitrogen oxides
and sulfur dioxide. The impact of contaminant emissions was modelled using the U.S.
Environmental Protection Agency (EPA) AERMOD atmospheric dispersion model and compared
to applicable Schedule 3 Standards of MOECC O.Reg. 419/05. The modelling scenario assumed
operating conditions for the Project that result in the highest concentration of each significant
contaminant at a point of impingement (POI) that the Project is capable of. The ESDM report
demonstrates that the Project can operate in compliance with the MOECC O.Reg. 419/05.
Further details are available in the ESDM Report.
3.5.2 Noise
The Noise Study identified noise sources from the Cogeneration Facility and other existing noise
sources. These sources included: heat recovery units, rooftop HVACs, biofilter exhaust fans,
wall-mounted exhaust fans, process air pipes, digester mixers, and transformers.
The five (5) nearest residential houses were identified as being representative of the most
impacted sensitive points of reception (PORs) in the vicinity of the facility. Figure 6 illustrates
the location of these PORs. The proposed Project’s major noise sources are limited to the
Cogeneration Facility exhaust stack and the combined heat and power (CHP) system air-born
casing noise. Representative sound data were provided from potential vendor design
specification details. Noise control measures will be incorporated into the design of the
Cogeneration Facility to meet the design condition of overall sound pressure level of 65 dB(A)
measure at 10 meters from the CHP Unit.
The assessment concluded the predicted noise levels from the standalone Project and from the
combined operation of the Project and the existing sources will comply with MOECC noise level
limits at the identified PORs. The Cogeneration Facility is not a significant source of vibration.
This Noise Study Report demonstrates that with the addition of the Cogeneration Facility, the
Waterloo WWTP will continue to operate in compliance with the MOECC noise guidelines.
Further details are available in the Noise Study Report.
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SECTION 3 – ENVIRONMENTAL EFFECTS
3.5.3 Odour
The proposed Cogeneration Facility is not expected to increase odour emissions from the
WWTP during normal operation as biogas pretreatment and high combustion temperatures are
sufficient to mitigate potential odour emissions. Considering the worst-case of incomplete
combustion, the total reduced sulfur (TRS) emissions from the Cogeneration Facility only
account for 0.45% of plant-wide TRS emissions. No negative environmental effects with respect
to odour are expected from the operation of the Cogeneration Facility.
Emissions from existing operations will be unaffected and are not Project related. These
emissions have been assessed and approved by the MOECC, and therefore no further odour
assessment was completed for this Project. Further details are available in the Odour Study
Report. Any public complaints will be responded to in accordance with the Project’s Emergency
Response and Communications Plan.
3.6 Environmental Effects Summary
Potential negative environmental effects for this Project are based on the following reports
developed in support of the REA application:
Cultural Heritage Self-Assessment Report;
Archeological Assessment Report;
Natural Heritage Assessment Report;
Water Assessment Report;
Emissions Summary and Dispersion (ESDM) Report;
Noise Study Report; and
Odour Study Report.
Please refer to these reports for more details.
Table 1 (from the Construction Plan Report) provides an overview of the potential negative
effects that may occur during the construction (and decommissioning) of the Cogeneration
Facility along with mitigation strategies and monitoring metrics.
Table 2 (from the Design and Operations Report) provides an overview of the potential negative
effects that may occur during the operation of the Cogeneration Facility along with
performance objectives, mitigation strategies, monitoring plan and contingency measures. The
performance objectives represent how successful mitigation will be measured. Contingency
measures will be put in place if the performance objective is not being met.
It should be noted that there are no anticipated negative emission or odour impacts. The
WWTP is expected to operate within its existing ECA requirements and as such, emissions and
odour have not been included in Table 2.
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SECTION 3 – ENVIRONMENTAL EFFECTS
Table 1. Construction – Potential Negative Environmental Effects
Potential Negative Mitigation Strategy Effectiveness
Environmental Effects Monitoring of
Mitigation
Generation of dust Erosion and sedimentation controls as outlined herein will be Monitoring of
onsite and potential implemented in addition to the implementation of a dust sediment control
offsite migration of dust suppression program – water or dust suppressants as measures to
needed. limit dust
generation.
Potential offsite Consult available guidance documents for Best Management Monitoring of
movement of soil from Practices. sediment control
cleared areas and
stockpiles through
erosion processes
To minimize land disturbance, the construction envelope will
be clearly demarcated and kept as small as possible.
Construction workers will be briefed on the sensitivity of
areas outside of the construction envelope.
measures to
minimize erosion
and sediment
runoff.
Minimize changes in land contours and natural drainage.
Minimize areas of impervious surfaces.
Minimize vehicle traffic on exposed soils, avoid compacting
or other hardening of natural ground surface. Avoid the
movement of heavy machinery on areas with sensitive
slopes.
Control access and movement of equipment.
Implement temporary erosion and sediment control
measures and runoff conveyance structure as appropriate
(silt fence, straw bales, vegetative buffers, etc.). Maintain
these measures until the site has stabilized.
In particular, silt fencing between the construction and the
cattail marsh and between the construction and the south
side of the WWTP.
Store any stockpiled materials at least 30 m away from
watercourse. Stockpiled material will be covered to prevent
erosion prior to transport.
Check that erosion control tools are in good repair and
properly functioning prior to conducting daily work and
reinstall or repair as required prior to commencing daily
construction activities.
At no time shall muddy water or debris be allowed to
discharge from the site into the adjacent natural features.
All areas are to be re-established immediately after
completion of the works.
SECTION 3 – ENVIRONMENTAL EFFECTS
Table 1. Construction – Potential Negative Environmental Effects
Potential Negative Mitigation Strategy Effectiveness
Environmental Effects Monitoring of
Mitigation
Generation of dust Erosion and sedimentation controls as outlined herein will be Monitoring of
onsite and potential implemented in addition to the implementation of a dust sediment control
offsite migration of dust suppression program – water or dust suppressants as measures to
needed. limit dust
generation.
Potential offsite Consult available guidance documents for Best Management Monitoring of
movement of soil from Practices. sediment control
cleared areas and
stockpiles through
erosion processes
To minimize land disturbance, the construction envelope will
be clearly demarcated and kept as small as possible.
Construction workers will be briefed on the sensitivity of
areas outside of the construction envelope.
measures to
minimize erosion
and sediment
runoff.
Minimize changes in land contours and natural drainage.
Minimize areas of impervious surfaces.
Minimize vehicle traffic on exposed soils, avoid compacting
or other hardening of natural ground surface. Avoid the
movement of heavy machinery on areas with sensitive
slopes.
Control access and movement of equipment.
Implement temporary erosion and sediment control
measures and runoff conveyance structure as appropriate
(silt fence, straw bales, vegetative buffers, etc.). Maintain
these measures until the site has stabilized.
In particular, silt fencing between the construction and the
cattail marsh and between the construction and the south
side of the WWTP.
Store any stockpiled materials at least 30 m away from
watercourse. Stockpiled material will be covered to prevent
erosion prior to transport.
Check that erosion control tools are in good repair and
properly functioning prior to conducting daily work and
reinstall or repair as required prior to commencing daily
construction activities.
At no time shall muddy water or debris be allowed to
discharge from the site into the adjacent natural features.
All areas are to be re-established immediately after
completion of the works.
SECTION 5
Public Health and Safety
Appropriate processes and procedures will be employed to prioritize the safety of the public
and the workers on site. Normal construction safety practices will be employed and the work
will be performed by licensed and experienced contractors. An emergency and contingency
plan will be in place for the construction period. The Cogeneration Facility will be inspected,
tested and commissioned before it goes into full operation